Telephone.



No. 788,296. PATENTED JULY 7, 1903'.- E. H. STRAUSS.

TELEPHONE.

APPLICATION FILED JULY 14, 1902.

N0 MODEL. 2 SHEETS-SHEET 1- 7m: NORRIS PEYERS co, PnoTouruu. wxsumcrcn,a. c.

No. 733,296. PATBNTED JULY 7, 1903.. Hi. H" STRAUSS.

TELEPHONE.

APPEIUATIQK FILED JULY 14, 1902.

N0 MODEL 2 SHBETSSHEBT 2 UNITED STATES iatented J'uly *7, 1903.

ERNEST HUGO STRAUSS, OF CHICAGO, ILLINOIS.

TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 733,296, dated July '7,1903.

Application filed July 14, 1902. Serial No. 115,503- (NO model-l To (bZZwhom, it Wtcty concern:

Be it known that I, ERNEST Huco STRAUSS, a citizen of the United States,residing at Ohioago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Telephones; and I dohereby declare the following to be a full, clear, and exact descriptionof theinvention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to certain improvements in electrical switches fortelephones. It has for its object to guard against receiving any shockfrom the generator or from any foreign currents by touching the receiverhook or switch and the generator-crank. It is also characteristic forsimplicity of construction and cheapness, is effective or perfect inaction, and is compact in the arrangement of parts.

In the accompanying drawings, illustrating the preferred embodiment ofmy invention, Figure 1 is a side elevation thereof. Fig. 2 is a planView. Fig. 3 is a detailed rear elevation of the same. Fig. 4 is adiagrammatic view showing the invention connected up intelephone-circuit.

Latitude is allowed herein as to details, as they may be changed withoutdeparting from the spirit of my invention and said invention remainintact and be protected.

In carrying out my invention 1 provide a long-arm switch-lever 1,usually called the hook, for suspending in position thetelephone-receiver, holding the parts in the bell circuit. Said lever orhook is fulcrumed near one end in a bracket or post 2, suitably securedto a base. The'fulcruming or pivoting of said lever is effected,preferably, by means of a pivot-bolt 3, passed through an aperture insaid lever and through coincident apertures in the upper end of theprincipal member of said bracket or post and an offset or lateral branchor second member 2 of the last-named part. Preferably arranged betweenthe upper end portion of said post and its lateral member is a coiled orhelical spring 4, with said pivot-bolt passing therethrough. Said springhas its ends secured to said post and lever, respectively, to effect thedepression of one end of said lever when the receiver is removedtherefrom, and the consequen t engagement of the contact-point nearertact-springs 6 6 6 6 6, preferably of German silver or of other suitablemetal, fo the respective circuits above named. The contact-springs 6 6are connected or wired up, as at 6 6 with the generator 7 and bell 8,preferably as shown, this constituting the bell-circuit. Thecontact-springs 6 &c., are wired or connected up, as at 6 6", via theelectric battery 9 with the transmitter 10, the receiver 11, andgenerator 7, &c., thus constituting the telephone'or talking circuit,the usual ground-wire connections being provided for in each of theforegoing circuits. The lower one of the contactsprings 6 has anupwardly bent or deflected portion or shoulder 6 to provide for theeffective engagement therewith of the upper contact spring, as the lastnamed is depressed by the preferably hard-rubber contact-point 12 of thelever or book 1, as takes place in returning the receiver to said hookor lever, putting the parts into the bell-circuit. The two lower ones ofthe contactsprings 6, 850., are likewise provided with upwardly bent ordeflected portions or shoulders 6 to secure effective engagementtherebetween and the uppermost contact-spring as it is depressed by asecond preferably hard rubber contact-point 12 of the lever 1, as takesplace under the action of the spring 4 in removing the receiver fromsaid hook or lever, putting the parts into the telephone or talkingcircuit. The contact-points 12 12 of the lever or hook I are arrangedupon opposite sides of its fulcrum, thereby being adapted to effect,with the action of the spring 4, as will have been observed fromrtheforegoing, the bringing alternately intoservice the bell-circuit and thetelephone or talking circuit, as may be required.

From this construction and arrangement of parts it will also be notedthat no part of any circuit or circuits is formed through the metal baseor supporting-post of the switch-lever thereon. Consequently no shockfrom the generator via that route or from foreign currents by touchingsaid switch-lever and the generator-crank can take place, as would beliable to occur and has been found in practice to result. This device isexceedingly simple, can be produced at the minimum eX- pense, and iscompact in arrangement.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. A switch-lever for suspending a telephone-receiver, in combinationwith contactsprings having engaging shoulders or projections, additionalcontact-springs adapted to be brought into engagement with said contactspring shoulders or projections, and means carried by said levercomprising contact-points, one arranged upon each side of the fulcrum ofsaid lever for effecting connection between the first-namedcontact-springs and said lever as it is actuated.

2. A switch-lever for suspending a telephone-receiver, in combinationwith contactsprings having engaging shoulders or projections, additionalcontact-springs adapted to be brought into engagement with saidcontact-spring shoulders or projections, a non conductor carrying saidcontact-springs, and means carried by said lever comprisingcontact-points, one arranged upon each side of the fulcrum of said leverfor effecting connection between the first-named contact-springs andsaid lever as it is actuated.

3. A switch-lever for suspending a telephone-receiver, havingnon-conducting contact-points arranged upon opposite sides of itsfulcrum in combination with contactsprings having engaging shoulders orprojections, and contact-springs adapted to be engaged by saidnon-conducting contact-points and brought into engagement with saidshoulders or projections, and means for actuating said switch-lever,substantially as described.

4. A switch-lever for suspending a telephone-receiver, in combinationwith contactsprings having engaging shoulders or projections, additionalcontact-springs adapted to be brought into engagement with saidcontact-spring shoulders or projections, the support or bracket of saidlever having a lateral non-conducting member supporting saidcontact-springs, and means carried by said lever for effectingconnection between the first-referred-to contact-springs and said lever,as it is actuated.

5. A switch-lever for suspending a tele phone-receiver, in combinationwith series of contact-springs, one series comprising two springs, onehaving a shoulder or projection engaged by the companion spring, and theother series embracing three springs, the lower ones having threeshoulders or projections, the lowermost shoulder or projection beingengaged by the intermediate contactspring, and the shoulder of theintermediate spring being engaged by the uppermost contact-spring, andmeans carried by said lever for etfecting connection there-between, asit is actuated, and the top contact-springs of the two series.

6. A switch-lever for suspending a telephone-receiver havingnon-conducting contact-points arranged upon opposite sides of itsfulcrum, in combination with series of contact springs, one seriescomprising two springs and the other series three springs, the lowerspring of the first-referred-to series having a shoulder or elevationengaged by the upper spring thereof and the lowermost and intermediatesprings of the latter series having like shoulders or projections, theshoulder of the lowermost spring being engaged by the intermediatespring, and the shoulder of said intermediate spring being engaged bythe uppermost spring, and a non-conducting support for said series ofcontact-springs, applied to the fulcrum-post of said lever.

In testimony whereof I aflix my signature in presence of two witnesses.

ERNEST HUGO STRAUSS. Witnessesz R. A. BURTON, J. K. MoMAHoN.

